Territory



(No Model.)

I LDER,

OSGILLATING STEAM ENGINE. No. 324,098. Patented Aug. 11, 1885.

WITNESSES NITED STATES ATENT 11 Erica.

OSCILLATING STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 324,098, dated August 11, 1885.

Application filed March 17, 18r5.

(No model.)

Be it known that I, IVILLIAM ELDER, of

Fort Ooeur dAlene, in the county of Kootenai, and Territory of Idaho, have invented a new and useful Improvement in Oscillating Steam- Engines, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is afront elevation,partiall y broken away, and showing one cylinder and steamchest in section. Fig. 2 is a sectional side elevation on the irregular line as 00, Fig. 1. Fig. 3 is a horizontal section through the center of the steam-chests, with one cylinder in its place. Fig. 4 is a horizontal section through the steam-valve. Fig. 5 is a transverse sectional elevation on the line y y of Fig. 4. Fig. 6 is a sectional elevation of the same on the line 2 z of Fig. 4; and Fig. 7 is a cross-section of the reversing-valve, showing the position of the steam-ports.

The object of this invention is to improve the construction of the oscillating steam-engine, to make it simple, more reliable, and convenient, and easily controlled.

The invention consists in particular construction of the oscillating trunnion cut-off, the reversing-valve,and reversing mechanism, and arrangement of oiling chamber in the trunnionbox.

The invention also consists in parts and de tails, and combinations of the same, as will hereinafter be more fully described and claimed.

A indicates the frame of an oscillating steam-engine; A 'A, the uprights suitably secured to a base, B. To the lower cross-piece of each upright is secured a pillow-block, O. In suitable hearings in the pillow-blocks is mounted a shaft, D, on the outer ends of which shaft are secured the crank-disks E. On the shaft D, between the uprights A of the frame, is mounted the fly or band wheel F. On the upper ends of the uprights A is formed, or to them is attached, the trunnion-box G. On the upper part of the trunnion-box is formed or to it is attached the valve-chest H, which valve-chest has an upward extension, H, for the ingress steam-chest H In the trunnionbox G are formed the apertures I, in which apertures are fitted for oscillation the trunnions or pivotsJ of the cylinders K, which cylinders may be of any approved construction.

The piston-rods L of the pistons M pass out through the usual stuffing -boxes and glands, a. The pistonrods have wrists N suitably connected by the crank-pins O to the disks E.

To the trunnion-box G on each sideis secured by bolts a heavy horizontal bar, 1?,which bars extend outward alongside of each cylinder K, and between which bars the cylinders are supported. On the ends of the bars P are formed screw-studs b.

On each cylinder is formed, or to it is attached, a pivot, c. A cross-bar, Q, having apertured ends, and a hub, Q, aperturcd for the pivot c of the cylinder, is passed over the screw-studs b. Near the ends of the cross-bars Q are secured, by bolts or rivets, springs R, having elongated apertures at their free ends, through which apertures pass the studs b. A nut, (Z, is screwed on each screw-stud b, which nuts take on the free ends of springs R,whereby the springs can be regulated to exert a greater or less pressure on the bars Q and cylinder K.

The trunnions J are secured by bolts 6 to cylinders K. A pintle, f, guides to place and helps to sustain the trunnion of each cylinder, or the cylinders and trunnions can be cast in one piece. Each trunnion J has L-shaped cut-off steampassages g, which passages connect with the steam-passages h of the cylinder. The trunnions are provided with an annular recess, in which recess takes a packing, t. On the periphery of trunnions Jare formed oil-channels j, which channels connect with the oil-chamber G whereby the trunnions J and shoulders 75 of the cylinders K are con tinuously lubricated. To the trunnion-box G are attached cups Z for filling the oil-chamber G In the trunnion-box G- are formed the steamchests S and S, divided by a partition, S", at the top, and by a partition, S at the bottom. Passages G connect the steam-chests S S and S S at the top, and passages Gr connect the steam-chests, atbottom. In the walls of steamohests S,at the top,are formed ports m,and at the bottom ports m. In the walls of the steam-chests S, at the top, are ports a, and at the bottom ports at. The ports in m and a n connect alternately with the ports g of trunnions J and passages h of the cylinders, and

IOO

according to the direction in which the engine is running, whereby the ports at m and a a and the cut-off ports 9 and passages h of the trunnions and cylinders become alternately induction and eduction port-s.

Cocks 0 are provided on trunnion-box G, which connect with passages G at 0,whereby the water of condensation can be drawn off from the cylinders. The valve chan1ber H is formed with a tapering aperture, in which is placed the rotary reversing-valve U. A saucer-shaped apertured disk, T, is placed 011 one end of the valve chamber H, through which disk is passed a screw, g, which screw is screwed in a threaded aperture formed in the tapering end of the valve U. A spiral or other spring, q, is placed between the head of screw q and disk T, by means of which screw the spring can be adjusted to exert a greater or less pressure, as may be desired, to retain the valve in working position.

In the valve-chamber H, in the top, are formed ports 1' 1', opening into the steamchest H and which ports register and con nect with ports 8 s in the valve U. In the valve-chest H, in the bottom, are formed ports 0- i", which ports are in line vertically with the ports 1* r. The ports 0' open into the steam-chests S, and the portsr into the steamchcsts S.

In the valve U are formed the T-shaped ports 5 s, which steamports are arranged qnartering, as shown in Fig. 7, so that as either of the ports .9 stand in horizontal position, and its port 8 in a vertical position, the steam rises in the aperture 3 and exhausts through the port 8. The other aperture, s, is in vertical position and closed, and the other port, 8, in horizontal position, and open as the steam-port.

In each side of the valve-chest H is formed, or to it is attached, an apertured nipple, t, which nipple is connected by an elbow, to, and pipe u, to conduct away the exhaust steam. In the top of the steam-chest H a screw-threaded aperture is formed, in which is screwed a pipe, 2;. On the pipe is screwed valve 10, for turning on and shutting off steam from the boiler. To the steam-chest H is attached the lubricator V, by which lubricator the valve ,U and cylinders can be oiled. On the stem of the valve U is secured the arm U.

To the top of the base B, at one end, is secured, or to it is attached, a stand, X, in

, which stand is journaled a shaft, Y. To one end of the shaft is rigidly secured an arm, XV, to the outer end of which arm is 0011- nccted the lower end of a connectingrod, XV. The upper end of the rod XV is connected to the arm U.

To the stand X is secured, by bolts or otherwise, a frame, Z, having a curving or segmental top cross-piece, Z, in which crosspiece a horizontal slot, 2, is formed, having end stop -notches, z 2 A lever, XV, is secured to the shaft Y by a key or otherwise,

which lever extends upward, between the cross-bar Z and the front cross-bar, Z, which front cross-bar exerts a spring-pressure on lever XV A stop catch, a", is jointed to the upper end of the lei'er XV, which catch is arranged to take in the stop-notches z, z, and z of the cross-bar Z to hold the valve U, whereby the lever can be held in any position in which it is placed when reversing the engine, or it can be held at the middle notch, 2 which stops the engine. When the lever XV 2 is clear back or forward in the slot .2, in either of stop-notches c or a the engine has full head of steam. By moving away the lever from middle or point of rest .2 or from the stops 2 e the engine can be easily and conveniently controlled and reversed.

Constructed as shown and described, the engine is simple and convenient in starting, stopping, and reversing without shock or jar, and particularly adapted as a winding engine, and for propellers and various other uses.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an oscillating engine, the reversingvalve, constructed substantially as shown and described, with T-shaped steam-ports connecting the ingress-steam chest and the.

steanrchests of the trunnion-box alternately, whereby the steam is conducted to the cyl' inders, and the engine can be reversed, as set forth.

2. In an oscillating engine, the cylinders constructed with trunnions having the alternating cut-off ports 9, in combination with the apertured stea1n-chests and the oil-chamber G, substantially as shown and described, and for the purpose set forth.

3. In an oscillating engine, the combination, with trunnion-box G, having steamchests S S, and the valvechest H, having steam -passages z t" 2' and exhaust t, of the valve U, having T-shaped ports S.

4. In an oscillating engine, the trunnionbox G, adapted to receive the trunnions of the cylinders, and formed with the steamchests S S, oil-chamber G and having steamports on m" a n, substantially as shown and described.

5. In an oscillating engine, the combina tion of the trunnion-box G, the bars P, the cross-bar Q for supporting the cylinders, and the spring R, substantially as shown and described.

6. In an oscillating engine, the combination, with the oil-chamber G, of the cylinders K, provided with the trunnions J, projecting into the oil-chamber and having oilpassages on their peripheries, substantially as herein shown and described.

XVILLIAM ELDER.

XVi tness es:

JOHN XV. MoENDnnE, J OHN S'rltcir. 

